I use it but change it at 5,000 miles and have had good OA's. My truck weights almost 12,000 lps. every day and when I tow sometimes a GCVW of 22-23,000 lbs. so it is worked . I also have a SCT with costom tunes from Inovative Diesel.
I use Mobil 5w/40. Since the ultra low sulfer fuel came out I tried just changing the filter every 5k, and not exceeding 10k for an oil change based on the condition of the oil. It's been over a year and no problems.
I have used Mobil 1 for intervals of 7500 not to exceed 10k with a by-pass filter kit. I'm really happy with the results and will go back to Mobil 1 at the next change. I cant seem to find it on the shelves as of late.